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IEEE/AIEE 75-1958 - AIEE Proposed Test Code for Power-Facor Testing of Mineral Oil Insulated Instrument Transformers

Description: This test code applies to instrument transformers of present-day design with high-voltage windings insulation class 2.3 kv and above and low-voltage windings below 1 kv insulation class that are immersed in mineral oil.
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